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HOME : FLUOROPOLYMER PROPERTIES
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FLUOROPOLYMER RESINS
PTFE
Polytetrafluoroethylene is a versatile high temperature, low friction, chemically inert, high dielectric strength material. It can be supplied in very thin wall tubing for electrical applications and heavy wall for pressurized chemical transfer. Tubing and insulated wire are made by a hydraulic ram extruder using a “preform” of fine powder compressed with a lubricant. The lubricant is driven off and the resin is sintered in a tubular oven. The size of the preform(s) loaded into the extruder determines the maximum continuous length of tubing or wire. Markel has the largest capacity machine available to provide long continuous lengths of high-precision products. Specific grades of resin must be selected to provide the highest performance in products such as coaxial cable dielectric, high-pressure hose liners and ultra low permeation fuel hose. Markel specializes in using fillers to enhance mechanical performance in push pull control cables and in supporting thin wall PTFE tubing with a bonded jacket of nylon. Conductive liner is available for electrostatic dissipation.
PERFORMANCE CHARACTERISTICS:
Broadest service temperature range –240° to 260° C (-400° to 500° F)
Chemically inert to most industrial chemical and solvents
Excellent electrical insulation
High thermal stability
Low permeability
Flammability: UL94 rated V-O (self-extinguishing)
FDA compliant
Moisture absorption practically zero
No odor or taste
APPLICATIONS:
Electrical insulation
Air sampling
Chemical transfer
Spray painting
Pulp & paper processing
Plating
Food and beverage
HIGH TEMPERATURE WIRE INSULATION
PHYSICAL PROPERTIES:
See chart to compare properties of the various fluoropolymer resins
PFA
Perfluoroalkoxy is a melt extrudable high performance resin with performance characteristics very close to PTFE. Maximum service temperature is 260° C (500° F). Melt extrusion yields unlimited continuous lengths. A high purity grade is available for use in integrated circuit production. Markel specializes in adding fillers to enhance characteristics such as heat transfer that has been increased by 3 times.
PERFORMANCE CHARACTERISTICS:
· Service temperature 260° C (500° F)
Chemically inert to most industrial chemicals and solvents
High thermal stability
Moisture absorption practically zero
No odor or taste
Flammability: UL94 rated V-O (self-extinguishing)
FDA compliant
APPLICATIONS:
· Chemical transfer
DI water for IC production
Food processing
Heat exchangers
High temperature wire insulation
PHYSICAL PROPERTIES:
See chart to compare properties of the various fluoropolymer resins
HIGH PERFORMANCE FEP
Fluorinated Ethylene Propylene is a melt extrudable high performance resin with a maximum operating temperature significantly below that of PTFE and PFA. It is chemically inert to most industrial chemicals. FEP has greater optic clarity making it useful in sight gauges and UV water disinfection systems. High resistance to stress in long-term exposure to high temperature caustic chemicals sets this resin apart from the standard performance grade of FEP tubing. Markel specializes in blending fillers with FEP to enhance mechanical performance. One example is to increase heat transfer by a factor of 3X.
PERFORMANCE CHARACTERISTICS:
· Maximum service temperature 204° C (400° F)
High molecular weight resin resists stress cracking
Chemically inert to most industrial chemicals and solvents
High thermal stability
Low permeability
FDA compliant
Moisture absorption practically zero
No odor or taste
Flammability: UL94 rated V-O (self-extinguishing)
APPLICATIONS:
· Chemical transfer
Heat exchangers
Food processing
PHYSICAL PROPERTIES:
See chart to compare properties of the various fluoropolymer resins
STANDARD FEP
Fluorinated Ethylene Propylene has many of the same characteristics as the high performance grade with the exception of long-term chemical stress resistance. It is chemically inert and does not add odor or taste to water in disinfection applications. Good UV transmittance at 254mm makes it an excellent candidate for UV bulb protection sleeves and coils.
PERFORMANCE CHARACTERISTICS:
· Service temperature 200° C (392° F)
Chemically inert to most industrial chemicals and solvents
Good UV transmittance
High thermal stability
Low permeability
FDA compliant
Moisture absorption practically zero
No odor or taste
Flammability: UL94 rated V-O (self-extinguishing)
APPLICATIONS:
· Chemical transfer
UV water disinfection systems
Stack gas sampling
Water sampling
Food processing
Spray paint systems
PHYSICAL PROPERTIES:
See chart to compare properties of the various fluoropolymer resins
PVDF
Polyvinylidene Fluoride is a melt-processed resin used extensively in the high purity semiconductor market that requires tubing with low extractibles. Resistance to halogens and acids makes it popular in the pulp and paper industry. High resistance to gamma radiation and hot acids makes it suitable for nuclear waste processing. Resistance to ozone makes it suitable for use in water purification systems. Two grades of flexible PVDF are available at the sacrifice of about 40° C in operating temperature but with improved impact and elongation properties at ambient and low temperatures.
PERFORMANCE CHARACTERISTICS:
· Operating temperature 150° C (302° F)
Flammability: UL94V-O (self-extinguishing)
Does not support growth of fungi
High resistance to chemical stress cracking
APPLICATIONS:
· DI water delivery in semiconductor manufacturing
Chemical delivery in pulp and paper production
Nuclear waste processing
Ozone delivery
PHYSICAL PROPERTIES:
See chart to compare properties of the various fluoropolymer resins
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Markel Corporation
435 School Lane
Plymouth Meeting, PA 19462
610-272-8960
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